JPH0464853A - Air conditioner - Google Patents

Abstract

PURPOSE:To feed surrounding air in response to a concentration of carbon dioxide gas for every room by a method wherein a VAV degree of opening control means for calculating a concentration of carbon dioxide gas and a heated condition and changing a degree of opening of a variable air volume blowing (VAV) in response to these two signals and an air conditioner connected to an air supplying duct with VAV and having a function to feed the surrounding air. CONSTITUTION:A carbon dioxide gas sensor device 1 and a hot heat sensor device 2 output a CO2 concentration signal and a heated state signal to a VAV degree of opening control means 4 through a signal line. The VAV degree of opening control means 4 receiving each of the signals calculates at first an air conditioning load from a heated state signal, determines a required amount of surrounding air in reference to the CO2 concentration signal and then a final degree of opening of VAV3 is determined and controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an air conditioner that introduces outside air while conditioning the air inside a living room such as an office building.

BACKGROUND OF THE INVENTION In recent years, air conditioners have become mainstream that use an air conditioner to condition the air inside a living room while introducing outside air.

In conventional air conditioning for office buildings, etc., the method for controlling carbon dioxide concentration is that one carbon dioxide concentration detection device is installed inside the air conditioner for each air conditioner that handles air conditioning for one floor. The part through which the return air passes (-generally called the return air chamber)
The amount of outside air introduced is determined based on the carbon dioxide concentration after the operation satisfies the thermal conditions.

With this method, even if rooms on the same floor were divided into multiple rooms by partitions, etc., the carbon dioxide concentration was controlled to be the same in all rooms.

Problems to be Solved by the Invention In such conventional air conditioners, even though the carbon dioxide concentration differs from room to room even on the same floor, the carbon dioxide concentration is controlled to be the same. ,
There were rooms with very poor air quality and rooms with excessive ventilation, and the problem was that the operating conditions of air conditioners were inefficient and uneconomical.

The present invention solves such problems by providing each small room with a carbon dioxide scum sensor unit, a thermal sensor unit, a variable air volume outlet (VAV), and a VAV opening control means. The object of the present invention is to provide an air conditioner characterized by a blower that introduces outside air according to the carbon dioxide concentration of each room.

Means for Solving the Problems In order to achieve the two objectives, the air conditioner of the present invention according to claim 1 includes a carbon dioxide gas sensor unit that detects the indoor carbon dioxide concentration and a carbon dioxide gas sensor unit that detects the indoor thermal state. The temperature sensor unit 1 inputs the VAV and each signal from the carbon dioxide gas sensor unit and the temperature sensor unit, calculates the carbon dioxide concentration and thermal state, and changes the opening degree of the VAV according to these two signals. The opening degree control stage means is connected to the VAV through an air supply duct and is composed of an air conditioner having an outside air introduction function.

Further, the air conditioner of the present invention according to claim 2 is provided with the above-mentioned carbon dioxide gas sensor unit, a thermal sensor→no unit,
A plurality of systems are provided in which a combination of a VAV and a VAV opening degree control means are provided, and an air conditioner that is connected to each of the VAVs via an air supply duct and has an outside air introduction function; The controller is connected to each of the VAV opening control means and determines and controls the amount of outside air introduced into the air conditioner.

Function: The air conditioner according to claim 1 satisfies the thermal condition in each small room based on the thermal condition obtained by the thermal sensor unit, and then adjusts the temperature according to the carbon dioxide concentration obtained by the carbon dioxide sensor unit. outside air can be introduced.

In the air conditioner according to claim 2, the required amount of outside air introduced for each small room is determined based on the carbon dioxide concentration obtained by the carbon dioxide gas sensor unit, and the amount of outside air introduced into the air conditioner is determined and controlled by the summation. Then, the air conditioning load for each small room is determined based on the thermal state obtained by the thermal sensor unit, and the capacity of the air conditioner can be determined and controlled by the summation.

Embodiment Hereinafter, the first embodiment of the present invention will be described with reference to FIGS. 1 and 2.
This will be explained with reference to the figures.

As shown in the figure, a carbon dioxide sensor unit 1 and a thermal sensor unit 2 are each installed on the wall of a small room, a variable air volume outlet (VAV) 3 is installed on the ceiling, and a VAV opening control means 4 is connected to the carbon dioxide scum sensor unit 1 and the thermal sensor unit 2 via signal lines, and the air conditioner 5 is installed outdoors and connected to the VAV 3 via an air supply duct 6. a and b each indicate a room.

The operation in the above configuration will be explained. The carbon dioxide gas sensor unit 1 and the thermal sensor unit 2 each output a CO2 concentration signal and a thermal state signal to the VAV opening degree control means 4 through signal lines, and the VAV opening degree control means 4 that receives each signal first detects the thermal state signal. Calculate the air conditioning load from the status signal,
Furthermore, the required amount of outside air to be introduced is determined from the CO2 concentration signal, and finally the opening degree of VAV3 is determined and controlled.

The processing operation of the VAV opening degree control means 4 will be explained using FIG. First, in step 21, the CO2 concentration signal is input, in step 22, the thermal status signal is input, in step 23, the air conditioning load is calculated from the thermal status signal, and in step 24, the CO2 concentration signal is input.
6 degree signal left signal determines the required amount of outside air introduction, and determines and controls the opening degree of VAV 3, taking the air conditioning load determined in step 25 as the center value, and looking for the most required amount of outside air introduction within a certain bandwidth. Thereafter, steps 21 to 25 are repeated.

Next, regarding the second embodiment of the present invention, FIGS.
This will be explained with reference to the figures.

As shown in the figure, the carbon dioxide sensor unit 1a and the thermal sensor unit 2a are each attached to the wall of the small room a, the VAV 3a is installed on the ceiling, and the VAV opening degree control means 4a is connected to the carbon dioxide sensor unit via a signal line. 1
a and the thermal sensor unit 2a, and the air conditioner 5
is installed outside the room and connected to the VAV3a via the air supply duct]・6, and each device in the small room is installed in the same manner, and the controller 7 is connected to the VAV3a and VAV3a via the control line.
It is connected to b.

” - The operation is explained below.

Carbon dioxide sensor unit 1a and thermal sensor unit 2a
The C02 concentration signal and the thermal state signal are respectively output to the VAV opening control means 4a through the signal line, and the VAV opening control means 4-a that receives each signal first calculates the air conditioning load from the thermal state signal. Then, the required amount of outside air to be introduced is determined from the CO concentration signal, and the controller 7 inputs the air conditioning load and the required amount of outside air to be introduced through the control line.The same thing is done for the small room, and finally the VAV is opened. degree control means 3a,
3b determines and controls the opening degrees of the VAVs 4a and 4b, respectively, and the controller 7 determines and controls the amount of outside air introduced into the air conditioner 5.

The processing operations of the VAV opening degree control means 4a, 4b and the controller 7 will be explained using FIG. First, in step 41, VAV
The opening degree control means 4-a and 4b each input the C02 concentration signal, input the thermal state signal in step 42, calculate the air conditioning load from the thermal state signal in step 43, and calculate the air conditioning load from the thermal state signal in step 43.
In step 4, the required outside air intake amount is determined from the COm degree signal. In step 45, the controller 7 obtains the small room a through the control line.
, b. The amount of outside air introduced into the air conditioner 5 is determined and controlled from the sum of the required amount of outside air introduced into each of the air conditioners. The degree control means 4a, 4b control the VAV3a
, 3b is determined and controlled. Thereafter, the processing from step 41 to step 46 is repeated.

The VAV opening degree control means and controller of this air conditioner are microcomputer applied devices, and it goes without saying that the processing means can be changed in addition to the flowcharts shown in FIGS. 2 and 4. be.

Effects of the Invention As is clear from the above embodiments, according to the air conditioner of the present invention, each small room is provided with a carbon dioxide gas sensor unit, a temperature sensor unit, a VAV, and a VAV opening degree control means. By configuring an air conditioner that can introduce outside air according to the carbon dioxide concentration of each room,
Even on the same floor, VAV and air conditioners are controlled for each small room, eliminating the coexistence of rooms with extremely poor air quality or rooms with excessive ventilation, and the operating status of air conditioners is as follows: Become efficient and economical. Furthermore, unlike conventional air conditioners that place importance only on the thermal environment, it is possible to provide an air conditioner that can perform comfortable air conditioning that also focuses on air quality.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an air conditioner according to a first embodiment of the present invention;
FIG. 2 is a flowchart showing the processing operation of the VAV opening degree control means of the air conditioner according to the first embodiment, FIG. 3 is a block diagram of the air conditioner according to the second embodiment of the present invention, and FIG. 4 is the same. Second
It is a flowchart which shows the processing operation of the VAV opening degree control means of the air conditioner of an Example, and a controller. 1, la, lb...carbon dioxide sensor unit,
2.2a, 2b... thermal sensor unit, 3,
3a, 3b...Variable air volume outlet (VAV)
, 4.4a, 4b...VAV opening degree control means, 5
...Air conditioner, 7...Controller, a,
b...Room.

Claims (2)

[Claims] (1) A carbon dioxide gas sensor unit that detects the indoor carbon dioxide concentration, a thermal sensor unit that detects the thermal state of the indoor room, a variable air volume outlet, and each signal of the carbon dioxide sensor unit and the thermal sensor unit are input, and carbon dioxide an opening control means that calculates the gas concentration and thermal state and changes the opening degree of the variable air volume outlet according to these two signals; and an opening control means that is connected to the variable air volume outlet via a supply air duct and introduces outside air. An air conditioner consisting of an air conditioner with functions. (2) A combination of a carbon dioxide gas sensor unit, a thermal sensor unit, a variable air volume outlet, and an opening control means.
A plurality of systems are provided, each of which is connected to each variable air volume outlet via an air supply duct, and is connected to an air conditioner having an outside air introduction function and an opening control means for each of the plurality of systems. , and a controller that determines and controls the amount of outside air introduced into the air conditioner.